If you experience any of the following you should go to the nearest hospital emergency department as soon as possible: 1  Heavy bleeding (soaking two pads every hour and/or passing golf ball sized clots) 2  Severe abdominal pain or shoulder pain. 3  Fever or chills. 4  Dizziness or fainting. 5  Vaginal discharge that smells unpleasant.
One of the most famous emission nebulae is the Orion Nebula (M42) located just below Orionâs belt. Another common type of emission nebula is a planetary nebula. These objects consist of a central white dwarf star surrounded by clouds of gas released as the original star evolved to the white dwarf phase.
Nebula means Cloud in Latin. A nebula is an interstellar cloud of hydrogen, helium, plasma and dust. They are often called stellar nurseries because stars are born within them. There are many types of Nebula, some stars have nebula's around them when they approach the final stages of their lives as in Wolf Rayet stars.